“Whether playing comedic or dramatic roles or doing standup routines or goofing around on talk shows, he never stayed in one mode for long. And it wasn’t just gradations of fun. You always sensed the darkness lurking. He could be sweet or silly for a while, or light and sweet; then you’d get a flash of anger or bitterness that seemed to erupt from nowhere and that did not seem fake, and then he’d slip back into sweet or silly, and make everyone laugh again.“